elkr.cz - robtex.com
elkr.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2001:1528:240::b🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network | ||||||
| PTR | locutus.blueboard.cz | ||||||
| A | 217.11.249.138🇨🇿 CASABLANCA-AS217.11.248.0/23 Casablanca INT | ||||||
| NS | shinzon.blueboard.cz ⭐ | ||||||
| A | 2a00:1ed0:45::b🇨🇿 VSHOSTING2a00:1ed0::/32 | ||||||
| PTR | shinzon.blueboard.cz | ||||||
| A | 178.251.187.7🇨🇿 VSHOSTING178.251.184.0/21 | ||||||
| PTR | shinzon.blueboard.cz | ||||||
| NS | jaguar.blueboard.cz ⚠️ Not in zone NS records | ||||||
| A | 2a00:1ed0:45::c🇨🇿 VSHOSTING2a00:1ed0::/32 | ||||||
| PTR | jaguar.blueboard.cz | ||||||
| A | 178.251.187.8🇨🇿 VSHOSTING178.251.184.0/21 | ||||||
| PTR | jaguar.blueboard.cz | ||||||
| NS | ns2.blueboard.cz | ||||||
| A | 2a01:4f8:13b:8d4::2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| A | 195.201.57.122🇩🇪 Hetzner195.201.0.0/16 HETZNER-DC | ||||||
| PTR | ns2.blueboard.cz | ||||||
| MX | mx.blueboard.cz ⭐ | ||||||
| A | 2001:1528:240::ca🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network | ||||||
| PTR | mx.blueboard.cz | ||||||
| A | 81.0.209.130🇨🇿 CASABLANCA-AS81.0.208.0/23 Casablanca INT | ||||||
| PTR | mx.blueboard.cz | ||||||
| TXT | v=spf1 a mx include:spf.blueboard.cz -all | ||||||
| SOA | shinzon.blueboard.czhostmaster@blueboard.cz 2018-04-12 #93 | ||||||
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ | ||||||
| NS | b.ns.nic.cz | ||||||
| NS | c.ns.nic.cz | ||||||
| NS | d.ns.nic.cz | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1784467041 | ||||||
Subdomains
mail.elkr.cz |
Same first word
Similar names
DNS History
14 records (6 active, 8 former)
●NSjaguar.blueboard.cz2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 05:10:48
● 2026-07-19 13:53:58
○NSns.pipni.cz2015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
●NSns2.blueboard.cz2020-02-10 → 2026-07-19 · 3 obs
● 2020-02-10 08:41:24
● 2026-07-19 13:53:58
○NSns2.pipni.cz2015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
○NSns3.pipni.cz2015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
●NSshinzon.blueboard.cz2020-02-10 → 2026-07-19 · 3 obs
● 2020-02-10 08:41:24
● 2026-07-19 13:53:58
○MXjaguar.blueboard.cz2020-02-10 → 2020-02-10 · 4 obs
● 2020-02-10 08:41:24
○ 2026-06-13 05:10:48
○ 2026-07-19 13:53:58
○MXmail.elkr.cz2015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
●MXmx.blueboard.cz2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 05:10:48
● 2026-07-19 13:53:58
○MXns2.blueboard.cz2020-02-10 → 2020-02-10 · 4 obs
● 2020-02-10 08:41:24
○ 2026-06-13 05:10:48
○ 2026-07-19 13:53:58
○MXns2.pipni.cz2015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
●A2001:1528:240::b2020-02-10 → 2026-07-19 · 3 obs
● 2020-02-10 08:41:24
● 2026-07-19 13:53:58
●A217.11.249.1382020-02-10 → 2026-07-19 · 3 obs
● 2020-02-10 08:41:24
● 2026-07-19 13:53:58
○A93.185.104.232015-07-25 → 2017-03-25 · 4 obs
● 2017-03-25 16:38:46
○ 2020-02-10 08:41:24
○ 2026-07-19 13:53:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| elkr.cz | ns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz | 3 records |
✅ Authoritative Response
Server:195.201.57.122
NS records: ns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1105ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 217.11.249.138 |
| AAAA | 1 | 2001:1528:240::b |
| NS | 2 | shinzon.blueboard.cz, ns2.blueboard.cz |
| MX | 1 | mx.blueboard.cz (pri: 10) |
| TXT | 1 | v=spf1 a mx include:spf.blueboard.cz -al |
| SOA | 1 | shinzon.blueboard.cz hostmaster.blueboar |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (ns2.blueboard.cz, jaguar.blueboard.cz, shinzon.blueboard.cz)
Analysis
Hierarchy
mail.elkr.cz is a subdomain of elkr.cz.
IP Addresses
elkr.cz points to the IP addresses 217.11.249.138 and 2001:1528:240::b
toptennis.cz, cfs.imunologie.cz, planik.eu plus two other host names have IP numbers in common with elkr.cz.
Name Servers
elkr.cz carries NS records delegating to jaguar.blueboard.cz, ns2.blueboard.cz and shinzon.blueboard.cz.
The name servers of elkr.cz overlap at least partially with those of other domains — among them mskollarova.cz, syrop.cz, arwengroup.cz and two more.
These name servers commonly appear in combination with the name servers ns2.miniserver.cz.
jaguar.blueboard.cz, ns2.blueboard.cz and shinzon.blueboard.cz are three hostnames that each resolve to a pair of IP addresses: jaguar.blueboard.cz to 178.251.187.8 and 2a00:1ed0:45::c, ns2.blueboard.cz to 195.201.57.122 and 2a01:4f8:13b:8d4::2, and shinzon.blueboard.cz to 178.251.187.7 and 2a00:1ed0:45::b.
Mail Servers
elkr.cz uses one mail server — mx.blueboard.cz.
The mail server setup of elkr.cz matches that of other domains such as inpg.cz, anabella.cz, hd-forum.cz and two others.
mx.blueboard.cz resolves to two IP numbers — 81.0.209.130 and 2001:1528:240::ca.